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Subject: Re: USB 2.0 chip in R20 / USB on-the-go / image viewer / mic preamp
From: Sebastian J. Osterfeld (sjo_at_stanford.edu)
Date: 2002-12-04


Sorry, I changed my name to the real thing... Accidentally put the news
server in the name field, too.

----- Original Message -----
From: "news.gmane.org" <SJOsterfeld_at_gmx.de>
Newsgroups: gmane.comp.systems.archos.rockbox.general
Sent: Tuesday, December 03, 2002 4:01 PM
Subject: USB 2.0 chip in R20 / USB on-the-go / image viewer / mic preamp

> Hello,
>
> I know rockbox has the documentation on the USB ISD-300 controller in the
> Archos recorder, but I think the Recorder 20 with its USB 2.0 interface
> might have another controller.
>
> Does anyone know which controller is in the Recorder 20GB? I haven't
gotten
> my recorder 20 yet... should arrive in 10 days or so, for ~US $200 after
> rebate... :)
>
> The idea is, since the Recoder 20 has advanced USB, maybe if we had the
> documentation we could see if the chip might possibly support USB
on-the-go,
> or if there will be a pin-compatible chip that does. USB on-the-go would
be
> great - imagine, hook up your digicam (say, while camping) via USB, and
the
> Recorder downloads all your data onto the HD. Then you're ready for
another
> day of shooting 200+ pics. In general, I'd like to add versatile USB
> data-leeching capabilities to the Archos :)
>
> I know that the Multimedia Jukebox sort of offers this feature, but I
don't
> like it all that much: No replaceable AA batteries, only USB 1.0
integrated,
> and all the good features (USB 2.0, firewire, smartmedia reader) require
> bulky and expensive add-on modules... :(
>
> So, I'd rather have the Recorder 20 with integrated USB 2.0, and somhow
> implement USB on-the-go. Then I'd also try to implement a 4-grayscale
image
> viewer, just to check if the jpgs arrived o.k. - I mean, I think the small
> color display on the Multimedia Jukebox is nice, but not really good
enough
> for anything serious, so having a grayscale display is almost as good.
>
> I just wish I could program better...
>
> Oh, here's one thing I can do, though: I will try to build my own Archos
> mic-preamp... does anyone, by chance, have a picture of what the original
> $50 pre-amp from Archos looks like on the inside? I found some schematics
> for a preamp here:
> http://www.geocities.com/ferocious_1999/md/micpreamp2.html which I intend
to
> slighly modify by using the newer and advanced low-power hifi op-amp
OPA350
> from TI. Maybe this 5V op-amp will make a good replacement/upgrade for
> whatever they have in the Archos preamp... so, once again, does anyone
have
> an idea what the internals of the Archos preamp look like? Battery?
Circuit
> board? Probably all integrated w/o solder... Etc. ?
>
> Thanks...
>
>
>
>
>



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